From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: Noob dumb question (extending emacs) Date: Mon, 25 Oct 2021 22:22:21 +0300 Message-ID: References: <875ytnzka1.fsf@zoho.eu> <87h7d6zrx9.fsf@zoho.eu> <87fssqxp1s.fsf@zoho.eu> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16001"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.7+183 (3d24855) (2021-05-28) Cc: help-gnu-emacs To: Yuri Khan Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Oct 25 21:38:31 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mf5ni-0003wu-Dk for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 25 Oct 2021 21:38:30 +0200 Original-Received: from localhost ([::1]:50446 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mf5nh-0002dO-6v for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 25 Oct 2021 15:38:29 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44322) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mf5bS-0005Kt-Nf for help-gnu-emacs@gnu.org; Mon, 25 Oct 2021 15:25:51 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:35491) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mf5bQ-0001oZ-1X for help-gnu-emacs@gnu.org; Mon, 25 Oct 2021 15:25:50 -0400 Original-Received: from localhost ([::ffff:41.75.189.151]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 0000000000027F02.00000000617704B8.00004325; Mon, 25 Oct 2021 12:25:44 -0700 Mail-Followup-To: Yuri Khan , help-gnu-emacs Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:134153 Archived-At: Yuri and Michael H., you are very right, too simple password generation without enough entropy produces duplicate passwords. The way to go is to create some entropy. Reading /dev/urandom is not a portable solution. At this moment I would not know if it works on DragonflyBSD which I use on some computers, I will check later. But that does not mean that anybody may guess the password produced on this computer. If somebody knows how to read slice of a file like /dev/urandom, let me know, otherwise I have to use external command. (defun rcd-read-urandom (&optional length) "I am also free to modify the Emacs Lisp unlimited times." (shell-command-to-string "head -n 1 /dev/urandom")) (defun rcd-password-generate-1 (string) "Return capitalized or downcased single symbol from a string" (random (format "%s" (rcd-read-urandom))) (let* ((max (length string)) (rnd (random max)) (single (substring string rnd (+ rnd 1)))) single)) (rcd-password) ⇒ "5l}tAl9hvk^ofQkqbSWh" --- I am now more random... -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns In support of Richard M. Stallman https://stallmansupport.org/